Saw-jointer.



E. M. PRING.

SAW JOINTER.

APPLICATION FILED MAY 5. 1914.

1 1 1 6,842, Patented Nov. 10, '1914.

7 3 14 y 4 i@ /5 l0 a THE NORRIS PETERS CDA. PHOTO-LITHO., WSHINGTDN. D.5,

U'NrrEDsrArns PATENT OFFICE ELZA MPRING, or ALLEGANY, OREGON.

f Specification of Letters Patent.

To all whom it may concern.'

- Be it known that I, ELZA M. PRING, citizen of the United States,residing at Allegany, in the county 4of Coos and State of Oregon, haveinvented certain new and useful Improvements in Saw- J ointers, of whichthe following is a specification.

My invention relates to saw, jointersand thevprimary object of theinvention is the provision of a jointer so constructed that it willjoint the cutting teeth of a saw to a uniform length transverselythereof.

A further object of the invention is` to so construct the'jointer thatit will give a uniform and predetermined curve to the edges of teeth ofcross cut saws.

A further object of the invention is to provide a jointer so constructedthat a lile may be readily applied thereto or removed therefrom, and toprovide means whereby the file may be curved to any predetermineddegree.

Still another object is to provide a saw jointer of such simplicity ofconstruction that it may be cheaply manufactured and readily used.

Other objects will appear in the course of the Jfollowing description.

My invention is illustrated in the accompanying drawings wherein:

yFigure 1 is a front elevation of a saw with my improved saw jointermounted thereon. Fig. 2 is a perspective view of the saw jointer. Fig. 3is a sectional View on the line 3-3 of Fig. 1. Fig. l isa perspectiveview of a file adapted to be used with my jointer. l

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the' accompanying,drawings by the same reference,y characters.

is of openwork or skeletonic form and is preferably cast and at itsupper .end is formed with the inwardly projectingflange `3. The ends ofthis flange are formed with downwardly turned extremities 4 adapted toengage .over the extremities of the file used yand just inward of theseextremities the flange is formed withv theushoulders' 4a againstwhich`the ends of the file restf The middle of thel flange is upwardly offsetasr at 5 to form a bridge.k Through this middle upwardly ybowed portion5 is a screw threaded 4perforation 6 for engagement with a screw shank7. y .f a;

The inner face ofthe frame 2 is kprovided withthel laterally projectingflanges or ribs 8 andthe inwardly yprojecting flanges yor ribs r9. .Theribs or flanges Stare in alinement with each other but the inner endsofthe flangesfare spaced from eachother. The l flanges 9 areofalso. inalinement with each other and 1nl vertical alinement with ``the flanges8. These iangesS and 9. project in:

ward to a plane extending through the inid- ,dle plane of the back orflange 3.

y Patented Nov. 1o, 1914. 3

'Application led May 5, 1914. Serial No. 836,469. y

extending ends 11 with inwardly turned eX- tremities 12 adapted toengage'bene'ath the marginal edges of theflle 13. The Lfile 13 asillustrated in Fig. l is just long enough to rest upon the shoulders orabutments kla and to be engaged `at its ends by the hookshaped`extremities 4. The middle of the file is engaged by the clip 10.

AMounted upon the screw7 is the wing nut 14y and when this wing nutisturned in one direction it will act to draw upward fon the screw?? thuscausingthe clip 10 to be drawn inward or toward theportion 5 and actingto bend the middle of the file..V As the 'ends' ofthe file engage withthe shoulders 4a, `it

will'be obvious thatthe file ,will be bowed and that the degree ofcurvature vof the `file will'depend uponthe extent to which the nut 14is turned up.y Thus this degreeof curvature maybe very` delicatelyadjusted and thus the file may be adjustedto suit the j curvature of anycross cut saw. A

Inactual use the saw 15 is placed within a vise (not shown) and of anysuitable character and with the teeth upward. i The jointeristhenfdisposed with the flanges 8 and 9 against the saw and with the leengaging the toothed edge of the saw. The jointer is then reciprocatedto file the edge. Inasmuch as the tile is curved by the bowing of itsmiddle portiomit is obvious that the teeth engaged by the file will beVlilrewise curved. -As the frame 2 holdsthe file exactly at right anglesto the saw, it will be obvious that the teeth will be filed uniformlytransverse to the length of the saw.

The frame of the jointer is of such construction. that it may -bereadilyeast andthus may be cheaply made. It will also be seen that exclusive ofthe file thereare only three pieces to theV jointer, two of these `beingan' ordinary "bolt-and nut.

' The teeth of the file 13 do not extend the full length 4of the filebutthe end` portions v16 of the file. are devoid ""ofyteeth. f Thesmooth-surfacel at each. end r of the. fileY is` for thepurpose'ofregulatingthe cuttingof the file. `By reason ofthe fact thatythe ends lare smooth surfaced and that-the curvature of the file can `beincreased vor decreased by the thumb screw, the file cannbeiadjusted soas tocutvery ylightly on the pointsof the saw teethzand prevent it from.cutting away any portion ofthe :saw teetlrunnecessarily and yto nopurpose. #My :jointer permits a file to be usedf'or about twicethelength .of any ordinaryf jointer; Thus I can: secure ka true circle forthe entirelength of the iile, thus enabling .the raker gage .to workmore accurately, and also yso jointing4 ythe `saw that it will runsmoother and do more work before the teeth require rejointilng. Thelength ofthe file causes it to work more accurately than if the file.were short.`

. lVliat I claim is:

1. A saw jointer comprising a frame having .inwardly projecting ribsadapted to contact with the side of thezsaw and an inwardly projectingflange lextending along its upper edge, the middlefof said flangefbeingupwardly bowed, the endsiofthe flange being formed withdownwardlyzextending abutments, a screwxpassing through the upwardlybowed portion of the flange, a nut engagingthe screw, and a fileengaging' clip swiveled upon the lowerendofzthe screw.

2: Asaw joi'ntervcomprilsing a frameh'aving inwardly projectingiribsandw'an inwardly projecting fiange'extending along its upper edge, theendsof thefiangef-being formed with downwardlyv extending abutments andVthe middle lof' the flange being upwardly fb'owed, a screw .passingthrough the upwardly fbowed -portion yof the' flange s a nutengaging'thescrew, a` file engaging clip swiveled .upon the. lowerVendfofthe screw, and a filebearing at its endsfagainst theabutmentsr'and fat its middle engaged ywith said' clip.

3..A saw jointer. comprising a skeletonic theends of the flange beingformed with frame having upper and lower pairs of insaid framealsohaving an inwardly projecting flange extendingalong its upper edge,

the middle of the flange being bowed and downwardly extending abutments,a screw passing through the middle of the flange, a

nut engaging the screw, a file engaging clip swiveled upon said nut andhaving inwardly extending extremities, and a file engaging at; its endsagainst the abutments and at its middle engaged by said clip.

4. A saw jointer comprising a frame having aplurality of pairs yoflongitudinally extending inwardly projecting integral ribs, the pairs ofribs being longitudinallyv spaced from each other, said frame alsohaving-fan' inwardly projecting longitudinally extending integral flangekat' its upper end, the middle of said fiange-being upwardly bowed'andperforated, a screwpassing through the perforation of the'fiange, a

nut engaging lthe screw, a U-shapecil file engaging clipswiveledruponthe screw and having inwardly turned extremities, and a vfilebearing'at its ends against the-abutments, they middle 'off the lebeing-engaged by said clip.

' 5; A' saw jointer comprising af frame having inwardly projecting ribsadapted to' con- 95 -tact with the side of a saw andv an inwardlyprojecting iange extending along its upper edge, the extremities cfr-theflange being downwardly extended to engage over a .file and being formedwithy seats supporting Athe extremitiesv of the file`l and engaging the`ends of thel file to prevent longitudinal movement thereof, a fileresting at .its exftremities upon said shoulders, and means at themiddle of the frame engaging the middle 'of the file and bowing itinward.

6; A saw jointer comprising a Lfile supporting frame', the ends of theframe being `formed with shoulders projecting from the "frame -forsupporting the extremities of a file, the middle. of the'frame havingmeans for engagingt-he middleof the file and bowing it'inwa'rdifand afile'supported Iby said frame, said file having plane faced ends, themiddle porti'onlof'the file being' formed 1] 5 with cutting teeth.

7 A saw jointer compri-sing a `frame `having inwardly projecting ribsvand an inwardly projectingflange or back extending 'along its'upperedge,"the ends of the iiange 120 having `file'supporting*shoulders andthe n extremities of the ffiange being formed with hooks engageable overthe ends-of a file, the

middleof theflangefbeing upwardly bowed, a 'screw passing "throughf" thetupwardly 12b bowedaportlon ofthe flange, a lnut engaging the screw, ale engaging clip swiveled In testimon whereof I aix my signature Eponthe lower eng of the screlw, ad :ltdle in presence o two witnesses.

earin at its en s a ainst t e s ou ers and suported from logitudinalmovement ELZA M' PRING' [1" s'] 5 by the hooks, the middle of the lebeing Witnesses:

engaged by said clip, the ends of the file be- LYMAN BUNCH, ing planefaced. JOHN F. TELANDER.

copies of this patent may he obtained forl ve cents each, by addressingthe Commissioner of Patents,

' Washington, D. C,

